Why is data not updating in React Native?

Question

React Native

Why is the data not updated if I try to overwrite a variable? I run I_want_change_allPosts()

let allPosts=['blablabla'];
I_want_change_allPosts=()=>{
allPosts = null;
};

return (

onWillFocus={payload => ScreenUpdated(payload.action.routeName)}
/>



)

Answer 1

Please provide the entire component code, not just a few lines.
But if we are talking about React, then all data changes inside the component that the View should respond to are carried out through the this.setState method or the useState hook .